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UNTTED sTATns ,PATENT omncn. N

EDOUARD ERNEST Fnaninnnnnnraninnnrina, or ninrrn, runnen.

` Banen To all whom t may concern."

Be it known that I, EDOUARD ERNEST FER- DINAND LEPARMENTIER, a citizen of the Republic ot France, residing in Dieppe, Seine Infrieure, France, have invi-ntedl certain new and usefull improvements in Barges, of which the followingv is a specification!" The ob] ect` of `this l inventionis to pioyide a marine barge so constructed that l it cannot be sunk or capsized. j 1

The essential features of construction are the particular shape which preventsthe barge from capsizingnamely the cylindrical form oi the holds and the conical formof the ends, the external longitudinal ribs on the hull and the arrangements for hermetically closing the vessel to render it incapable of sink` lng.

An example of the construction is shown in the accompanying drawings in which Figure l is a side elevation; Fig. 2 a cross section on line X-X of Fig. l; Fig. 3 a plan; Fig. 4L a detail view drawn to an enlarged scale; Fig. 5 a plan of Fig. 4f; Fig. 6 a View similar to Fig. 1, but showing certain details, and Fig. 7 a cross section drawn to an enlarged scale on line X-X of Fig. 6.

The holds a are cylindrical and are eX- tended at each end of the barge `by conical portions The hatchways d are adapted to be closed hermetically by covers 0. e is the deck-house and 7 the fore-castle; g is the tiller of the rudder la and i is a breakwater having a cutwater prow.

As shown in Figs. 4 and 5, each hatch cover c is operated by a small fixed crane Z whichraises the cover and turning in a stepbearing m deposits it on the deckas indicated at c, or performs the reverse; movef ment; by this means the coversy can be strictly centered Whenput in place.

All openings, Wherever they be, namely in the deck-'hou`se e, Jfore-castle f, compartments b or holds a, may thus be hermetically closed so that the barge cannot be submerged.

Stability is insured for all cargoes inbulk, whether solid or liquid, owing to the internal prolile of the barge, which for all conditions of load gives a fixed and common position to all the diii'i'erential metacenters. This fixed position of the differential metacenters, placed at the center of the inside volume ot' the holds, is thus always situated above the center of gravity of the cargoes whatever may be their volume, density and nature.. In particular, for liquid cargoes, the metacen- Application nee august 11,1191?. 1 ,serial No. 185,704. y

speeieeoacineasta/en. Patenteaiiray i3, 1919.

tricinterior "development is reduced to a point and this point, commento all interior levels and, at the same time, the point of sup- 4port oi the cargopcoincides with the differential metacenter; it follows that the ,center otgravity of the empty barge, being `iliteiitionally below this differential inetacenter, thegeneral center of gravity for each condition ofload,whatever may be its nalture; Will always be` below" the differential 1metac`e`nter,'wliich is atfthesame time the metacenterdfthefeXternal hull; hence @la is always sure to be positive. y y .y y

`:t` the bargeare juxtaposed truncated `cones which, being surfaces capable of development, facilitate the construction.

`As shown in the` section Fig. 2, the ribs a are on the outside of the hull so as to simplify the construction; they increase the `rigidity and constitute keels for resisting rolling.

The barge need not necessarily be towed but -may be selffplro'pelled by machinery provided for the purpose.

4The cylindricaland conical shapes already mentioned may be'modiied externally- (c) by the addition ot' longitudinal eX- ternal ribs n, (Fig. 7 which, in addition to the function ascribed to them above, extend toward the ends Z9 (the dotted lines o of Fig. 6 represent the projections of the center lines 0 Fig. 7) so as to constitute lioat boardsLfor lifting the boat to the waves and insuring stability ot direction by directing the liquid streams.

() by the addition of stranding keels y) `ot dimensions suiicient to receive ixed or movable ballast g, in addition to that which maybe accommodated in the conical compartments ff.

Two or more barges may be coupled rigidly side `by side, tangentially or not, by

'means of a frame-work of tight sheet iron,

the barges having common foreand aftparts like `those described.

The object of this arrangement is to use the properties above enumerated, and in `particular the essential fact that the intelliquid cargoes and the inclination of the barge. The advantage of this is to insure to the barge an angle of Statie stability greater than 90o with any cargo, solid or liquid, and whatever its condition of load.

The position of the crane, as indicated in Fig. 5, is suitable for any kind of cover, but

more particularly to one of circular form; for square covers as shown 1n Fig. 5, 1t may ,be advantageous in certain casesto arrange the step-bearing m at the angle 0f the cover. Y AfI-Iaving thus described my invention and the best means I know of carrying the same -2. A barge having a hull externally and internally cylindrical, with conical ends lformed of successive conic frusta.

3. A barge having a hull externally and internally cylindrical, with conical ends formed of successive conic frusta of angles successively more obtuse.

4. A barge having a hull externally and internally cylindrical, with conical ends, and a deck-house having a cutwater prow sur- Inounting the conical bow, and the hull having a Jforecastle compartment communicating with said deck-house.

5. A barge having a hull externally and internally cylindrical, with conical ends, and a rudder partly cut away to conform to the conical stern.

In witness whereof- I have hereunto signed my name in the presence oftwo subscribing witnesses.

*EDOUARD ERNEST FERDINAND LEPARMEN'lIER.

Witnesses:

MENIER, V. NoUssAIL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

I Washington, D. C. 

